:root {
    --bg0: #1a1a1a;
    --bg1: #121212;
    --card: #2a2a2a;
    --card2: #252525;
    --border: #3a3a3a;
    --border2: #4a4a4a;
    --text: #d4d4d4;
    --muted: #999999;
    --muted2: #6e6e6e;
    --accent: #ffbb00;
    --glow: rgba(255, 187, 0, 0.08);
    --ok: #5cb85c;
    --warn: #ffbb00;
    --err: #d9534f;
    --radius: 0px;
    --shadow: 0 4px 16px rgba(0,0,0,0.4);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg0);
    font-size: 13px;
}
.app {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6px 14px 20px 14px;
}
.header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 4px;
}
.header-left {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.header-title {
    font-size: 20px;
    font-weight: 650;
    letter-spacing: 0.2px;
    color: #ffffff;
}
.header-sub {
    color: var(--muted);
    font-size: 12px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.logo {
    height: 48px;
    margin-left: auto;
    display: block;
    filter: drop-shadow(0 10px 25px rgba(0,0,0,0.5));
    opacity: 0.95;
}
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.section { padding: 10px 12px 8px 12px; }
.section-title {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--muted);
    margin-bottom: 6px;
}
.topbar {
    padding: 8px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}
.topbar-status {
    display: flex;
    align-items: center;
    gap: 14px;
}
.topbar-conn {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.status {
    padding: 7px 12px;
    border-radius: 0;
    border: 1px solid var(--border2);
    background: #1e1e1e;
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 0.2px;
}
.ok { color: var(--ok); }
.warn { color: var(--warn); }
button {
    padding: 6px 12px;
    background: #333333;
    color: var(--text);
    border: 1px solid var(--border2);
    border-radius: 0;
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    letter-spacing: 0.2px;
    transition: transform 0.08s ease, background 0.15s ease, border-color 0.15s ease;
}
button:hover {
    background: #3d3d3d;
    border-color: #5a5a5a;
}
button:active {
    transform: translateY(1px);
    background: #444444;
}
button:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}
button.accent {
    background: rgba(255,187,0,0.12);
    border-color: rgba(255,187,0,0.35);
    color: var(--accent);
}
button.accent:hover {
    background: rgba(255,187,0,0.20);
    border-color: rgba(255,187,0,0.50);
}
button.danger {
    color: var(--err);
    border-color: rgba(217,83,79,0.30);
}
button.danger:hover {
    background: rgba(217,83,79,0.10);
}
.progress-bar {
    height: 3px;
    background: #333;
    margin-bottom: 10px;
    overflow: hidden;
}
.progress-fill {
    height: 100%;
    background: var(--accent);
    width: 0%;
    transition: width 0.3s ease;
}
.nav-strip {
    display: flex;
    gap: 0;
    overflow-x: auto;
    margin-bottom: 10px;
    border: 1px solid var(--border);
    background: #222;
}
.nav-tab {
    padding: 8px 14px;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--muted2);
    cursor: pointer;
    border-right: 1px solid #333;
    white-space: nowrap;
    transition: color 0.15s ease, background 0.15s ease;
    user-select: none;
}
.nav-tab:hover {
    color: var(--text);
    background: #2a2a2a;
}
.nav-tab.active {
    color: var(--accent);
    background: var(--card);
    border-bottom: 2px solid var(--accent);
}
.page-content { display: none; }
.page-content.active { display: block; }
#page-firmware.active { display: block; }
.firmware-layout {
    display: flex;
    gap: 10px;
    align-items: stretch;
    margin-bottom: 10px;
}
.firmware-col-left {
    flex: 1 1 50%;
    min-width: 0;
}
.firmware-col-left .form-group {
    overflow: visible;
}
.firmware-col-right {
    flex: 1 1 50%;
    min-width: 0;
}
.firmware-col-right .form-group:last-child {
    margin-bottom: 0;
}
.firmware-col-right .form-label {
    min-width: 0;
    flex-shrink: 1;
}
.firmware-col-right .form-right {
    min-width: 0;
    grid-template-columns: 1fr auto;
}
.firmware-col-right .form-row {
    flex-wrap: wrap;
}
.form-group {
    border: 1px solid var(--border);
    background: #222;
    margin-bottom: 10px;
    overflow: hidden;
}
.form-group-title {
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent);
    background: rgba(255,187,0,0.04);
    border-bottom: 1px solid #333;
}
.form-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 7px 12px;
    border-bottom: 1px solid #333;
    gap: 10px;
    min-height: 36px;
}
.form-row:last-child { border-bottom: none; }
.form-label {
    font-size: 12px;
    color: var(--muted);
    flex-shrink: 0;
    min-width: 140px;
    padding-top: 6px;
}
.form-hint {
    grid-column: 1;
    justify-self: end;
    text-align: right;
    font-size: 11px;
    color: var(--muted2);
    line-height: 1.1;
    width: 145px;
    min-width: 145px;
}
.form-right {
    display: grid;
    grid-template-columns: 1fr 180px;
    column-gap: 10px;
    align-items: center;
    margin-left: auto;
    min-width: 320px;
}
.form-right > :not(.form-hint) {
    grid-column: 2;
    justify-self: end;
}
.form-right > .slider-row {
    grid-column: 1 / -1;
    justify-self: stretch;
}
.form-description {
    padding: 6px 12px;
    font-size: 11px;
    color: var(--muted2);
    line-height: 1.5;
    border-bottom: 1px solid #333;
    background: rgba(0,0,0,0.15);
}
input[type="text"],
input[type="number"] {
    grid-column: 2;
    width: 180px;
    height: 30px;
    box-sizing: border-box;
    padding: 5px 8px;
    background: #333;
    color: var(--text);
    border: 1px solid var(--border2);
    border-radius: 0;
    font-size: 13px;
    font-family: inherit;
    outline: none;
}
input[type="text"]:focus,
input[type="number"]:focus {
    border-color: var(--accent);
}
select {
    grid-column: 2;
    width: 180px;
    height: 30px;
    box-sizing: border-box;
    padding: 5px 8px;
    background: #333;
    color: var(--text);
    border: 1px solid var(--border2);
    border-radius: 0;
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    outline: none;
}
select:focus { border-color: var(--accent); }
select option {
    background: #2a2a2a;
    color: var(--text);
}
.toggle-switch {
    display: flex;
    align-items: center;
    cursor: pointer;
    gap: 8px;
}
.toggle-switch input[type="checkbox"] { display: none; }
.toggle-track {
    display: inline-block;
    width: 36px;
    height: 18px;
    background: #3a3a3a;
    border: 1px solid #4a4a4a;
    position: relative;
    transition: background 0.2s ease, border-color 0.2s ease;
    flex-shrink: 0;
}
.toggle-track::after {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 12px;
    height: 12px;
    background: #777;
    transition: left 0.2s ease, background 0.2s ease;
}
.toggle-switch input[type="checkbox"]:checked + .toggle-track {
    background: rgba(92, 184, 92, 0.20);
    border-color: rgba(92, 184, 92, 0.50);
}
.toggle-switch input[type="checkbox"]:checked + .toggle-track::after {
    left: 20px;
    background: var(--ok);
}
.toggle-label {
    font-size: 12px;
    color: var(--text);
}
.radio-group {
    display: flex;
    flex-direction: column;
    gap: 0;
}
.radio-row {
    display: flex;
    align-items: center;
    padding: 5px 12px;
    border-bottom: 1px solid #333;
    gap: 10px;
}
.radio-row:last-child { border-bottom: none; }
.radio-row input[type="radio"] { accent-color: var(--accent); }
.radio-row label {
    font-size: 12px;
    color: var(--text);
    cursor: pointer;
    flex: 1;
}
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    align-items: start;
}
.two-col > * { min-width: 0; }
.two-col .form-right {
    min-width: 0;
    grid-template-columns: 1fr 140px;
}
.two-col input[type="text"],
.two-col input[type="number"],
.two-col select { width: 140px; }
#foc-modulation-card .form-right { grid-template-columns: 1fr 175px; }
#foc-modulation-card input[type="number"],
#foc-modulation-card select { width: 175px; }
@media (max-width: 700px) {
    .two-col { grid-template-columns: 1fr; }
}
.console-card { margin-top: 6px; }
.console-output {
    background: #1e1e1e;
    border: 1px solid var(--border);
    padding: 8px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 12px;
    color: var(--muted);
    height: 164px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-all;
}
.console-input-row {
    display: flex;
    align-items: stretch;
    gap: 6px;
    margin-top: 4px;
}
.console-input-row input {
    flex: 1;
    height: 30px;
    padding: 5px 8px;
    background: #1e1e1e;
    color: var(--text);
    border: 1px solid var(--border);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 12px;
    outline: none;
}
.console-input-row input:focus { border-color: var(--accent); }
.console-input-row button { border-radius: 0; height: 30px; }
.console-actions {
    display: flex;
    gap: 6px;
    margin-top: 4px;
}
.footer-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--muted2);
    margin-top: 10px;
}
.footer-copyright { opacity: 0.7; }
.action-bar {
    display: flex;
    gap: 6px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}
.action-bar .spacer { flex: 1; }

/* Mode buttons grid */
.mode-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
    padding: 10px 12px;
}
.mode-btn {
    padding: 10px 8px;
    text-align: center;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    border: 1px solid var(--border2);
    background: #2a2a2a;
    color: var(--muted);
    cursor: pointer;
    transition: all 0.15s ease;
}
.mode-btn:hover {
    background: #333;
    color: var(--text);
}
.mode-btn.active {
    background: rgba(255,187,0,0.12);
    border-color: rgba(255,187,0,0.5);
    color: var(--accent);
}
/* Slider styling */
.slider-row {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
}
.slider-row input[type="range"] {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: #444;
    outline: none;
    border-radius: 0;
}
.slider-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent);
    border: none;
    cursor: pointer;
}
.slider-row input[type="range"]:disabled::-webkit-slider-thumb {
    background: #555;
}
.slider-val {
    min-width: 50px;
    text-align: right;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    flex-shrink: 0;
}
.slider-row .form-hint {
    flex-shrink: 0;
    min-width: 145px;
    width: 145px;
    text-align: right;
    white-space: nowrap;
}
.two-col .slider-row .form-hint {
    min-width: 0;
    width: auto;
}
.two-col .form-hint {
    min-width: 0;
    width: auto;
}
/* Info row */
.info-row {
    display: flex;
    gap: 20px;
    padding: 8px 12px;
    border-bottom: 1px solid #333;
}
.info-item {
    font-size: 12px;
    color: var(--muted);
}
.info-item strong {
    color: var(--text);
    font-weight: 600;
}

/* Available Firmware table */
.fw-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}
.fw-table th {
    text-align: left;
    padding: 6px 10px;
    background: rgba(255,187,0,0.04);
    border-bottom: 1px solid #333;
    color: var(--muted);
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}
.fw-table td {
    padding: 6px 10px;
    border-bottom: 1px solid #2a2a2a;
    color: var(--text);
    vertical-align: middle;
}
.fw-table tr:last-child td { border-bottom: none; }
.fw-table tr:hover td { background: rgba(255,255,255,0.02); }
.fw-table .fw-status {
    display: flex;
    gap: 6px;
    align-items: center;
    font-size: 13px;
}
.fw-table .fw-installed { color: var(--ok); }
.fw-table .fw-installed-label { color: var(--ok); font-size: 11px; white-space: nowrap; }
.fw-table .fw-bootincompat { color: var(--warn); }
.fw-table .fw-beta { color: #7bb3ff; font-weight: 700; }
.fw-table .fw-summary {
    max-width: 220px;
    white-space: normal;
    line-height: 1.3;
}
.fw-table .fw-message {
    font-size: 11px;
    color: var(--muted2);
    max-width: 160px;
    white-space: normal;
    line-height: 1.3;
}
.fw-table button {
    padding: 4px 10px;
    font-size: 11px;
}

/* ═══════════════════════════════════════════════
   Light Theme Overrides
   ═══════════════════════════════════════════════ */
[data-theme="light"] {
    --bg0: #f3f3f6;
    --bg1: #eaeaef;
    --card: #ffffff;
    --card2: #fafafe;
    --border: #e2e2ea;
    --border2: #d4d4dc;
    --text: #1a1a2e;
    --muted: #6b6b80;
    --muted2: #9494a6;
    --accent: #c08b12;
    --glow: rgba(192,139,18,0.04);
    --ok: #1a9e3f;
    --warn: #c08b12;
    --err: #d93025;
    --shadow: 0 2px 8px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
}

/* Header */
[data-theme="light"] .header-title { color: #1a1a2e; }
[data-theme="light"] .logo { filter: invert(1) drop-shadow(0 4px 12px rgba(0,0,0,0.08)); }

/* Status */
[data-theme="light"] .status { background: #f0f0f4; }

/* Buttons */
[data-theme="light"] button { background: #ffffff; color: #3c3c52; }
[data-theme="light"] button:hover { background: #f0f0f4; border-color: #c0c0cc; }
[data-theme="light"] button:active { background: #eaeaef; }
[data-theme="light"] button.accent { background: rgba(192,139,18,0.07); border-color: rgba(192,139,18,0.22); color: #9a7010; }
[data-theme="light"] button.accent:hover { background: rgba(192,139,18,0.13); border-color: rgba(192,139,18,0.35); }
[data-theme="light"] button.danger { border-color: rgba(217,48,37,0.16); }
[data-theme="light"] button.danger:hover { background: rgba(217,48,37,0.06); }

/* Progress */
[data-theme="light"] .progress-bar { background: #eaeaef; }

/* Nav strip */
[data-theme="light"] .nav-strip { background: #ffffff; }
[data-theme="light"] .nav-tab { border-right-color: #e2e2ea; }
[data-theme="light"] .nav-tab:hover { background: #f0f0f4; }

/* Form groups */
[data-theme="light"] .form-group { background: #ffffff; }
[data-theme="light"] .form-group-title { background: rgba(192,139,18,0.04); border-bottom-color: #e2e2ea; color: #9a7010; }
[data-theme="light"] .form-row { border-bottom-color: #f3f3f6; }
[data-theme="light"] .form-description { border-bottom-color: #f3f3f6; background: #fafafe; }

/* Inputs */
[data-theme="light"] input[type="text"],
[data-theme="light"] input[type="number"] { background: #f0f0f4; }
[data-theme="light"] select { background: #f0f0f4; }
[data-theme="light"] select option { background: #ffffff; }

/* Toggle */
[data-theme="light"] .toggle-track { background: #e2e2ea; border-color: #d4d4dc; }
[data-theme="light"] .toggle-track::after { background: #ffffff; box-shadow: 0 1px 3px rgba(0,0,0,0.12); }
[data-theme="light"] .toggle-switch input[type="checkbox"]:checked + .toggle-track { background: #1a9e3f; border-color: #1a9e3f; }
[data-theme="light"] .toggle-switch input[type="checkbox"]:checked + .toggle-track::after { background: #ffffff; }

/* Radio rows */
[data-theme="light"] .radio-row { border-bottom-color: #f3f3f6; }

/* Console */
[data-theme="light"] .console-output { background: #f0f0f4; }
[data-theme="light"] .console-input-row input { background: #f0f0f4; }

/* Mode buttons */
[data-theme="light"] .mode-btn { background: #f0f0f4; }
[data-theme="light"] .mode-btn:hover { background: #ffffff; }
[data-theme="light"] .mode-btn.active { background: rgba(192,139,18,0.07); border-color: rgba(192,139,18,0.35); color: #9a7010; }

/* Slider */
[data-theme="light"] .slider-row input[type="range"] { background: #e2e2ea; }
[data-theme="light"] .slider-row input[type="range"]:disabled::-webkit-slider-thumb { background: #d4d4dc; }

/* Info row */
[data-theme="light"] .info-row { border-bottom-color: #f3f3f6; }

/* Firmware table */
[data-theme="light"] .fw-table th { background: rgba(192,139,18,0.04); border-bottom-color: #e2e2ea; }
[data-theme="light"] .fw-table td { border-bottom-color: #f3f3f6; }
[data-theme="light"] .fw-table tr:hover td { background: #fafafe; }
[data-theme="light"] .fw-table .fw-beta { color: #3b7dd8; }

/* Theme toggle in footer */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    user-select: none;
    font-size: 11px;
    color: var(--muted2);
}
.theme-toggle:hover { color: var(--muted); }
.theme-toggle-label { font-size: 11px; }
.theme-toggle-track {
    width: 30px;
    height: 16px;
    background: #3a3a3a;
    border: 1px solid #4a4a4a;
    border-radius: 100px;
    position: relative;
    transition: background 0.2s ease, border-color 0.2s ease;
}
.theme-toggle-track::after {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 10px;
    height: 10px;
    background: #777;
    border-radius: 50%;
    transition: left 0.2s ease, background 0.2s ease;
}
[data-theme="light"] .theme-toggle-track {
    background: #e2e2ea;
    border-color: #d4d4dc;
}
[data-theme="light"] .theme-toggle-track::after {
    left: 16px;
    background: #c08b12;
}